Magnetic excitation and ground-state doublet splitting in Nd2Ir2O7 and Nd2Hf2O7
Recent neutron measurements revealed that Nd2Ir2O7 has a long-rang ordered antiferromagnetic structure below ~20 K, and the Kramers ground-state doublet of Nd3+ splits below its metal-to-insulator transition (MIT) temperature. In our recent polarized neutron scattering experiments at DNS at MLZ, long-range magnetic order at low temperatures have been observed in both Nd2Ir2O7 and Nd2Hf2O7. Since Hf4+ in Nd2Hf2O7 is expected to be nonmagnetic, it would be of high interest to verify whether a similar ground-state doublet splitting also occurs in Nd2Hf2O7 via inelastic neutron scattering (INS). However, such INS investigations have not been reported so far. We propose to investigate low-energy magnetic excitations and possible ground-state doublet splitting on two similar Nd-based pyrochlore compounds Nd2Ir2O7 and Nd2Hf2O7 at the cold-neutron time-of-flight spectrometer IN5 or IN6. we request in total 7 days of beamtime at IN5 (can be reduced to 4 days if necessary) or IN6 for the proposed two samples. The proposed experiment is complementary to our proposed IN4 experiment, and would form an important part of the PhD studying of the main proposer.
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FENG Erxi; BRUECKEL Thomas; Viviane Peçanha Antonio; Yixi Su and ZBIRI Mohamed. (2015). Magnetic excitation and ground-state doublet splitting in Nd2Ir2O7 and Nd2Hf2O7. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.4-04-475
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